diff --git a/apps/desktop/src/components/admin/MySqlDashboard.vue b/apps/desktop/src/components/admin/MySqlDashboard.vue
index 8db6b465a6..9f982f907a 100644
--- a/apps/desktop/src/components/admin/MySqlDashboard.vue
+++ b/apps/desktop/src/components/admin/MySqlDashboard.vue
@@ -14,6 +14,7 @@ import { useVerticalOverlayScrollbar } from "@/composables/useVerticalOverlayScr
 
 const props = defineProps<{
   connectionId: string;
+  clientSessionId: string;
 }>();
 
 const { t } = useI18n();
@@ -115,7 +116,7 @@ function formatClock(at: number): string {
 
 async function fetchVariables() {
   try {
-    const result = await api.executeQuery(props.connectionId, "", GLOBAL_VARIABLES_SQL, undefined, undefined, { maxRows: 2000 });
+    const result = await api.executeQuery(props.connectionId, "", GLOBAL_VARIABLES_SQL, undefined, undefined, { maxRows: 2000, clientSessionId: props.clientSessionId });
     variables.value = parseStatusResult(result);
   } catch {
     // Non-fatal: cards that depend on variables (max_connections/version) degrade.
@@ -129,7 +130,7 @@ async function fetchStatus(options: { silent?: boolean } = {}) {
   error.value = "";
   try {
     await connectionStore.ensureConnected(props.connectionId);
-    const result = await api.executeQuery(props.connectionId, "", GLOBAL_STATUS_SQL, undefined, undefined, { maxRows: 2000 });
+    const result = await api.executeQuery(props.connectionId, "", GLOBAL_STATUS_SQL, undefined, undefined, { maxRows: 2000, clientSessionId: props.clientSessionId });
     const sample: StatusSample = { at: Date.now(), status: parseStatusResult(result) };
     const next = [...samples.value, sample];
     samples.value = next.length > MAX_SAMPLES ? next.slice(next.length - MAX_SAMPLES) : next;
diff --git a/apps/desktop/src/components/admin/__tests__/MySqlDashboard.spec.ts b/apps/desktop/src/components/admin/__tests__/MySqlDashboard.spec.ts
new file mode 100644
index 0000000000..9e077c8f6a
--- /dev/null
+++ b/apps/desktop/src/components/admin/__tests__/MySqlDashboard.spec.ts
@@ -0,0 +1,102 @@
+// @vitest-environment happy-dom
+
+import { createApp, nextTick, type App } from "vue";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { GLOBAL_STATUS_SQL, GLOBAL_VARIABLES_SQL } from "@/lib/database/mysqlServerStatus";
+
+const mocks = vi.hoisted(() => ({
+  ensureConnected: vi.fn(),
+  executeQuery: vi.fn(),
+}));
+
+vi.mock("vue-i18n", () => ({ useI18n: () => ({ t: (key: string) => key }) }));
+vi.mock("@/stores/connectionStore", () => ({
+  useConnectionStore: () => ({
+    ensureConnected: mocks.ensureConnected,
+    getConfig: () => ({ name: "MySQL" }),
+  }),
+}));
+vi.mock("@/lib/backend/api", () => ({ executeQuery: mocks.executeQuery }));
+vi.mock("@/composables/useVerticalOverlayScrollbar", async () => {
+  const { ref } = await import("vue");
+  return {
+    useVerticalOverlayScrollbar: () => ({
+      hasOverflow: ref(false),
+      isScrolling: ref(false),
+      isDragging: ref(false),
+      thumbStyle: ref({}),
+      onScroll: vi.fn(),
+      onTrackPointerDown: vi.fn(),
+      onThumbPointerDown: vi.fn(),
+    }),
+  };
+});
+vi.mock("@lucide/vue", async () => {
+  const { defineComponent, h } = await import("vue");
+  const Icon = defineComponent({ setup: () => () => h("i") });
+  return { Activity: Icon, ArrowDownUp: Icon, ChevronRight: Icon, Database: Icon, Gauge: Icon, Loader2: Icon, RefreshCcw: Icon, Search: Icon, Timer: Icon, TriangleAlert: Icon, Users: Icon };
+});
+
+async function passthroughComponent() {
+  const { defineComponent, h } = await import("vue");
+  return defineComponent({
+    setup:
+      (_, { slots }) =>
+      () =>
+        h("div", slots.default?.()),
+  });
+}
+
+vi.mock("@/components/ui/button", async () => ({ Button: await passthroughComponent() }));
+vi.mock("@/components/ui/badge", async () => ({ Badge: await passthroughComponent() }));
+vi.mock("@/components/ui/select", async () => {
+  const component = await passthroughComponent();
+  return { Select: component, SelectContent: component, SelectItem: component, SelectTrigger: component, SelectValue: component };
+});
+vi.mock("@/components/common/MetricCard.vue", async () => ({ default: await passthroughComponent() }));
+vi.mock("@/components/chart/MetricLineChart.vue", async () => ({ default: await passthroughComponent() }));
+
+import MySqlDashboard from "@/components/admin/MySqlDashboard.vue";
+
+let app: App<Element> | null = null;
+let root: HTMLDivElement | null = null;
+
+async function flushMountedPolling() {
+  for (let i = 0; i < 4; i++) {
+    await Promise.resolve();
+    await nextTick();
+  }
+}
+
+beforeEach(() => {
+  mocks.ensureConnected.mockReset().mockResolvedValue(undefined);
+  mocks.executeQuery.mockReset().mockImplementation(async (_connectionId: string, _database: string, sql: string) => ({
+    columns: ["Variable_name", "Value"],
+    rows: sql === GLOBAL_STATUS_SQL ? [["Queries", "10"]] : [["version", "8.0.11"]],
+    affected_rows: 0,
+    execution_time_ms: 0,
+  }));
+  root = document.createElement("div");
+  document.body.appendChild(root);
+});
+
+afterEach(() => {
+  app?.unmount();
+  app = null;
+  root?.remove();
+  root = null;
+  document.body.innerHTML = "";
+});
+
+describe("MySqlDashboard session affinity", () => {
+  it("uses the dashboard tab session for status and variable polling", async () => {
+    app = createApp(MySqlDashboard, { connectionId: "mysql-1", clientSessionId: "tab-dashboard" });
+    app.mount(root!);
+    await flushMountedPolling();
+
+    expect(mocks.ensureConnected).toHaveBeenCalledWith("mysql-1");
+    expect(mocks.executeQuery).toHaveBeenNthCalledWith(1, "mysql-1", "", GLOBAL_STATUS_SQL, undefined, undefined, { maxRows: 2000, clientSessionId: "tab-dashboard" });
+    expect(mocks.executeQuery).toHaveBeenNthCalledWith(2, "mysql-1", "", GLOBAL_VARIABLES_SQL, undefined, undefined, { maxRows: 2000, clientSessionId: "tab-dashboard" });
+    expect(mocks.executeQuery).toHaveBeenCalledTimes(2);
+  });
+});
diff --git a/apps/desktop/src/components/layout/ContentArea.vue b/apps/desktop/src/components/layout/ContentArea.vue
index 03830b3cc4..e36c7f578d 100644
--- a/apps/desktop/src/components/layout/ContentArea.vue
+++ b/apps/desktop/src/components/layout/ContentArea.vue
@@ -2100,7 +2100,7 @@ defineExpose({ focusSearch, refreshData, refreshQueryEditorCompletionCache, hand
 
     <template v-else-if="activeTab.mode === 'mysql-dashboard'">
       <div class="min-h-0 flex-1">
-        <MySqlDashboard :key="activeTab.id" :connection-id="activeTab.connectionId" />
+        <MySqlDashboard :key="activeTab.id" :connection-id="activeTab.connectionId" :client-session-id="activeTab.id" />
       </div>
     </template>
 
diff --git a/apps/desktop/src/stores/queryStore.ts b/apps/desktop/src/stores/queryStore.ts
index 4f505462cd..a4be214715 100644
--- a/apps/desktop/src/stores/queryStore.ts
+++ b/apps/desktop/src/stores/queryStore.ts
@@ -1793,7 +1793,7 @@ export const useQueryStore = defineStore("query", () => {
       id,
       title: conn?.name ? `${conn.name} - ${t("serverDashboard.title")}` : t("serverDashboard.title"),
       connectionId,
-      database: conn?.database || "",
+      database: "",
       sql: "",
       isExecuting: false,
       isCancelling: false,
diff --git a/packages/app-tests/queryStore.test.ts b/packages/app-tests/queryStore.test.ts
index 4fc9407b93..afcb1c5e58 100644
--- a/packages/app-tests/queryStore.test.ts
+++ b/packages/app-tests/queryStore.test.ts
@@ -6103,6 +6103,42 @@ test("closing a data tab releases its tab-scoped client session", async () => {
   }
 });
 
+test("closing a MySQL dashboard releases its tab-scoped client session", async () => {
+  const restoreStorage = installMemoryStorage();
+  setActivePinia(createPinia());
+  const connectionStore = useConnectionStore();
+  const store = useQueryStore();
+  const originalFetch = globalThis.fetch;
+
+  connectionStore.addEphemeralConnection({ ...conn("mysql-1"), db_type: "mysql", port: 3306, database: "app" });
+  const tabId = store.openMysqlDashboard("mysql-1");
+  const closedSessions: any[] = [];
+
+  globalThis.fetch = async (input, init) => {
+    if (String(input) === "/api/query/close-client-session") {
+      closedSessions.push(JSON.parse(String(init?.body ?? "{}")));
+      return new Response(JSON.stringify(true), {
+        status: 200,
+        headers: { "Content-Type": "application/json" },
+      });
+    }
+    return new Response("unexpected request", { status: 500 });
+  };
+
+  try {
+    store.closeTab(tabId, { force: true });
+
+    await waitFor(() => closedSessions.some((body) => body.clientSessionId === tabId));
+    assert.ok(
+      closedSessions.some((body) => body.connectionId === "mysql-1" && body.database === "" && body.clientSessionId === tabId),
+      `expected close-client-session for MySQL dashboard, got ${JSON.stringify(closedSessions)}`,
+    );
+  } finally {
+    globalThis.fetch = originalFetch;
+    restoreStorage();
+  }
+});
+
 for (const dbType of ["oracle", "dameng", "gaussdb", "oceanbase-oracle"] as const) {
   test(`clearing a ${dbType} query schema releases its tab-scoped client session`, async () => {
     const restoreStorage = installMemoryStorage();